On Sep 9, 2011, at 6:06 AM, Andreas Grosam wrote: > Dir Members, > > I'm trying to use a NSURLConnection to download a large data file (>10 MB) > from a web service to the iPhone. Currently, testing on iOS 4.2.1, on a > device. The connection is established over WIFI. > > The problem I get with NSURLConnection is, that it internally uses a lot > (really a lot) memory for its data buffers. It seems, the connection reads as > much data as it can from the network and a tries to safe it in internal > buffers, no matter what, apparently until the system cannot provide more > memory. > > In a simple test app, NSURLConnections quite quickly consumes up to 10Mbyte > for a number of its buffers - on the iPhone!, which is probably the maximum > before the app will be killed. With Instruments, it can be viewed quite > easily.
For another datapoint, I've got an app that can (optionally) download a 12.9MB data file which uses NSURLConnection, and it works fine - no threading, just the standard asynch delegate callbacks. I need to make sure that I'm accumulating the data in a file instead of in memory (in connection:didReceiveData:), but there's no problem with crashing or other weird errors. Glenn Andreas gandr...@gandreas.com The most merciful thing in the world ... is the inability of the human mind to correlate all its contents - HPL _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
